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  <title>Gets the last key of an array</title>
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  <div id="layout-content"><div id="function.array-key-last" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">array_key_last</h1>
  <p class="verinfo">(PHP 7 &gt;= 7.3.0)</p><p class="refpurpose"><span class="refname">array_key_last</span> &mdash; <span class="dc-title">Gets the last key of an array</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.array-key-last-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>array_key_last</strong></span>
    ( <span class="methodparam"><span class="type">array</span> <code class="parameter">$array</code></span>
   ) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>

  <p class="para rdfs-comment">
   Get the last key of the given <code class="parameter">array</code> without affecting
   the internal array pointer.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.array-key-last-parameters">
  <h3 class="title">参数</h3>
  <dl>

   
    <dt>
<code class="parameter">array</code></dt>

    <dd>

     <p class="para">
      An array.
     </p>
    </dd>

   
  </dl>

 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.array-key-last-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the last key of <code class="parameter">array</code> if the array is not empty;
   <strong><code>NULL</code></strong> otherwise.
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.array-key-last-seealso">
  <h3 class="title">参见</h3>
  <ul class="simplelist">
   <li class="member"><span class="function"><a href="array_key_first.html" class="function" rel="rdfs-seeAlso">array_key_first()</a> - Gets the first key of an array</span></li>
   <li class="member"><span class="function"><a href="end.html" class="function" rel="rdfs-seeAlso">end()</a> - 将数组的内部指针指向最后一个单元</span></li>
  </ul>
 </div>


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